LinkedList Example In C#

namespace Consolepractice {
    class Program {
        public static void Main(string[] args) {
            document d1 = new document() {
                docname = "C# tutorial",
                    doctype = "PDF"
            };
            document d2 = new document() {
                docname = "Java tutorial",
                    doctype = "Word"
            };
            document d3 = new document() {
                docname = "SQl tutorial",
                    doctype = "Word"
            };
            document d4 = new document() {
                docname = "HTML tutorial",
                    doctype = "Word"
            };
            document d5 = new document() {
                docname = "CSS tutorial",
                    doctype = "PDF"
            };
            document d6 = new document() {
                docname = "Jquery tutorial",
                    doctype = "PDF"
            };
            PrintQue ob = new PrintQue();
            Console.WriteLine("Adding document operation start....\n \n");
            //add node at last position
            ob.Addlast(d1);
            ob.Addlast(d2);
            //add node at first position
            ob.AddFirst(d3);
            //add node before d1 node
            ob.AddBefore(d1, d4);
            //add node after d1 node
            ob.AddAfter(d1, d5);
            //add node at last position
            ob.Addlast(d6);
            foreach(var item in ob.lnk) {
                Console.WriteLine("Document nae:{0} and doctype:{1}", item.docname, item.doctype);
            }
            Console.WriteLine("\nAfter remove document operation ....\n \n");
            ob.RemoveFirst(); //remove first node
            ob.RemoveLast(); //remove last node
            ob.Removenode(d5); //remove Css tutorial node
            foreach(var item in ob.lnk) {
                Console.WriteLine("Document nae:{0} and doctype:{1}", item.docname, item.doctype);
            }
            Console.ReadKey();
        }
    }
    class PrintQue {
        public LinkedList < document > lnk = new LinkedList < document > ();
        public void Addlast(document node) {
            lnk.AddLast(node);
        }
        public void AddFirst(document node) {
            lnk.AddFirst(node);
        }
        public void AddBefore(document node, document newnode) {
            lnk.AddBefore(lnk.Find(node), newnode);
        }
        public void AddAfter(document node, document newnode) {
            lnk.AddAfter(lnk.Find(node), newnode);
        }
        public void RemoveFirst() {
            lnk.RemoveFirst();
        }
        public void RemoveLast() {
            lnk.RemoveLast();
        }
        public void Removenode(document node) {
            lnk.Remove(node);
        }
    }
    class document {
        public string docname;
        public string doctype;
    }
}